Help: creating an aerodynamic coefficient lookup table..

Hi guys, I am an aerospace undergrad doing some project on creating a 6dof simulation.

Problem is that I need a coefficient lookup table, for a very specific missile. Though I have a .stl file (made through autodesk fusion) , I dont have a single idea how to actually get the coefficients now.

Maybe ANSYS student version(cause they’re free)? OpenFOAM? And how do I assure myself that these aren’t.. “dogshit”values?

Thanks in advance! I had nowhere else to ask for help to.